Add suggestion functionnality (first version)

webapp/src/app/geosource/components/index.ts

...rce/components/metadata-list/metadata-list.component.html

...ponents/search-bar/search-input/search-input.component.ts

...geosource/components/suggestion/suggestion.component.html

...geosource/components/suggestion/suggestion.component.scss

...source/components/suggestion/suggestion.component.spec.ts

...p/geosource/components/suggestion/suggestion.component.ts

.../src/app/geosource/models/elasticsearch-response.model.ts

webapp/src/app/geosource/models/index.ts

webapp/src/app/geosource/models/suggestion.model.ts

webapp/src/app/geosource/services/elasticsearch.service.ts

webapp/src/i18n/messages.en.xlf

webapp/src/i18n/messages.fr.xlf

webapp/src/styles.scss